As a furnace operates and blows out air, it must at the same time return to it that same amount of air. A return air plenum is the ducting that is attached to a furnace for that return air to flow through, and is used as a central manifold for other return air ducting. Alpine's return air plenums are manufactured with a 1 inch filter rack as part of the plenum, and include one appropriately sized filter.

Your order will also include Alpine's exclusive free instructional video on DVD! Watch as a pro quickly assembles the return air plenum, and shows you how to do the same. You'll have all your questions answered as you see how fast and extrememly easy it is to put together. Plenum assembles in about 5 minutes.

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In 2002 Alpine Home Air Products became the first company to sell heating, air conditioning and indoor air-quality products online. We have proudly served hundreds of thousands of customers, helping them save time and money by buying their products direct.